I don't want to make this discussion go on too long, but
On 20/04/10 13:38, G. Allegri wrote:
1 - we had to make a simple points in polygon count. The polygon layer wasn't 'clean' (we hadn't perfect boundary adjacency for example), and it was made of hundreds of thousands of polygons. The v.in.ogr process, and the necessary clean, was taking too much time respect to the simple operation we needed, so we imported it in saga, and with a few clicks we had our result.
This is typically the example where quick and dirty "works", but where it might contain imprecise results if you do not ensure clean polygons: any point falling into sliver polygons will be counted double. So this is exactly why I would plead for not allowing such operation in GRASS, as I see as one of the trademarks and strengths of GRASS its rigour in pushing the use as far as possible towards a careful and thoughful use of the data.
Moritz _______________________________________________ grass-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-dev
